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3. Consider the sewer system shown in the figure below. A main sewer (MS5) with manholes, M5.4 (starting manhole) to M 5.1 discharges into manhole M5 of the trunk sewer. Branch sewers discharge into manhole M5.1 - M5.4 of the main sewer (MS5) as shown in the figure. Invert levels of the branch sewers discharging into manhole M5.4 - M5.1 are 97.223, 98.775, 98.311, and 96.334 m respectively. Invert level of the trunk sewer leaving manhole M5 is 93.700 m. Based on this information explain how values in the last three columns of the design table for main sewer (MS5) have been calculated. All branch sewers have 400 mm diameter. The ground level in the area under question is between 101 and 102 m. Table 1. 1 2 10 11 13 14 15 16 Tabular Calculations for Design of main Sewer M5 3 4 5 6 7 8 9 Peak Peak Diameter, Slope Flow, Flow, mm Discharge, Length, (2003) (2023) (2023) m/s m/s Liter/s Full Actual Manhole Velocity, (2023) m/s Full Actual Invert Elevation, m Upper Lower m From 12 Present Peak Flow, Year 2020 Liter/s 0.05 0.09 0.12 0.15 To Self- Total Cleaning Fall, Velocity m (2000) m/s 0.688 0.176 0.829 0.154 0.861 0.202 0.929 0.244 M5.4 M5.3 M5.2 M5.1 500 700 M5.3 M5.2 M5.1 TI 88 77 101 122 0.05 0.09 0.12 0.15 0.15 0.28 0.33 0.45 0.002 0.002 0.002 0.002 0.169 0.414 0.414 0.591 0.15 0.28 0.33 0.45 0.860 1.076 1.076 1.176 0.972 1.152 1.184 1.235 96.773 96.397 96.213 95.734 96.597 96.243 96.011 95.490 700 M5 800 3. Consider the sewer system shown in the figure below. A main sewer (MS5) with manholes, M5.4 (starting manhole) to M 5.1 discharges into manhole M5 of the trunk sewer. Branch sewers discharge into manhole M5.1 - M5.4 of the main sewer (MS5) as shown in the figure. Invert levels of the branch sewers discharging into manhole M5.4 - M5.1 are 97.223, 98.775, 98.311, and 96.334 m respectively. Invert level of the trunk sewer leaving manhole M5 is 93.700 m. Based on this information explain how values in the last three columns of the design table for main sewer (MS5) have been calculated. All branch sewers have 400 mm diameter. The ground level in the area under question is between 101 and 102 m. Table 1. 1 2 10 11 13 14 15 16 Tabular Calculations for Design of main Sewer M5 3 4 5 6 7 8 9 Peak Peak Diameter, Slope Flow, Flow, mm Discharge, Length, (2003) (2023) (2023) m/s m/s Liter/s Full Actual Manhole Velocity, (2023) m/s Full Actual Invert Elevation, m Upper Lower m From 12 Present Peak Flow, Year 2020 Liter/s 0.05 0.09 0.12 0.15 To Self- Total Cleaning Fall, Velocity m (2000) m/s 0.688 0.176 0.829 0.154 0.861 0.202 0.929 0.244 M5.4 M5.3 M5.2 M5.1 500 700 M5.3 M5.2 M5.1 TI 88 77 101 122 0.05 0.09 0.12 0.15 0.15 0.28 0.33 0.45 0.002 0.002 0.002 0.002 0.169 0.414 0.414 0.591 0.15 0.28 0.33 0.45 0.860 1.076 1.076 1.176 0.972 1.152 1.184 1.235 96.773 96.397 96.213 95.734 96.597 96.243 96.011 95.490 700 M5 800
